checkStatus(h, buf, "mark", 20, 20, true, 10, 10);
// mark at specified position
buf = factory.newInstance();
buf.position(5);
buf.mark();
checkStatus(h, buf, "mark", 20, 20, true, 15, 5);
buf.position(6);
checkStatus(h, buf, "mark", 20, 20, true, 14, 6);
buf.reset();
checkStatus(h, buf, "mark", 20, 20, true, 15, 5);